[#1430] Add marshaller one string define

sflphone-client-gnome/src/dbus/marshaller.list

@@ -3,3 +3,4 @@ VOID:STRING,STRING
 VOID:INT
 VOID:STRING,INT
 VOID:STRING,DOUBLE
+VOID:STRING

sflphone-common/src/account.cpp

@@ -49,11 +49,11 @@ void Account::loadConfig()
 
 void Account::setRegistrationState( RegistrationState state ) { 
     
-  //if (state != _registrationState) {
+  if (state != _registrationState) {
 	_debug("Account::setRegistrationState\n");
         _registrationState = state; 
 
 	// Notify the client
 	Manager::instance().connectionStatusNotification( _accountID );
-	//}
+	}
 }